"Sounds like somebody had a bottle of sparkling apple cider for dinner and went a little nuts."

Receive the latest television updates in your inbox

Jimmy Kimmel at the 2012 White House Correspondents' Association Dinner late last month.

On Tuesday's "Jimmy Kimmel Live!" the late-night host poked fun at Rick Santorum's decidedly under-the-radar endorsement of one-time political rival — and presumptive GOP nominee — Mitt Romney. After months of attacking Romney's credibility, Santorum backed the former Massachusetts governor's presidential bid in the thirteenth paragraph of an e-mail he sent out to supporters shortly before midnight on Monday.

"This is the fun part of the election," Kimmel joked, "where the guys who have been saying terrible things about each other for the last six months suddenly pretend they're on the same team. It's like a 'Jersey Shore' reunion special, really."

"Sounds like somebody had a bottle of sparkling apple cider for dinner and went a little nuts," Kimmel quipped.